Rinnai Q130SN - Manuel (Page 23)

Installation & Servicing Instructions Rinnai Q-Series
23
6.1.2 Safety valve
An ASME 30 psi pressure relief valve is installed on the plumbing kit included
with the boiler.
6.1.3 Low water cut off
The Rinnai Q boiler has a factory installed pressure switch type Low Water Cut
Off (LWCO). Check your local codes to see if a Low Water Cut Off is required
(LWCO) and if this device conforms to local code. See the Rinnai Boiler
Applications Manual for further information.
The Low water cut off is not serviceable.
6.2 Expansion tank
An expansion tank must be part of the central heating system. The expansion tank
must be appropriate to the water content of the installation. The pre-charge pressure
depends on the installation height above the mounted expansion tank. The expansion
tank is NOT a part of the delivery and should be sourced locally. Please refer to the
expansion tank manufacturer for further information. The Combi boiler Q175C is
equipped with an expansion tank connection. This pipe is connected with the three
way valve and boiler pump.
Fill expansion tank to a minimum of 14.5 psi.
For the boiler to function correctly, it is necessary to connect the expansion
tank to the expansion tank connection on the boiler. If the expansion tank is
not connected to the supplied connection damage to the boiler may occur.
Note:
The solo boilers Q85S, Q130S, Q175S and Q205S can be provided with an optional
internal three way valve. When this valve is installed in the boiler, the boiler is provided
with an expansion tank connection.
This pipe is connected with the three way valve
and boiler pump.
For the boiler to function correctly, it is necessary to connect the expansion
tank to the expansion tank connection on the boiler. If the expansion tank is
not connected to the supplied connection damage to the boiler may occur.
See the Rinnai Boiler Applications Manual for further information regarding placement
of the expansion tank in the system. See the Rinnai 3-way valve indirect tank
installation manual for further information regarding the installation of the 3-way valve
indirect tank kit.
6.3 Underfloor heating system (plastic pipes)
When using oxygen-permeable pipes, e. g. for floor heating systems, you must
separate the system using plate heat exchangers.
No recourse can be made to the terms of the warranty in the event of failure
to observe the regulations pertaining to plastic underfloor heating pipes.
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